Combined latch and lock



(Model.)

A. H. BROWN.

COMBINED LATGEAND LOGK.

Patented Jan. 11, 1.887.

'Ela "ana mim @wh/Leases f1! 0MM c. 1% JMW PATnNT Triton.

ALFRED H.. BROW'N, OF FREEIORI, ILLINOIS.

COMBINED LATCH-iv AND LOCK.

SPncIrrcATroN forming part of Letters Patent No. 356,027, dated January11,1887'.

Application filed une 29, 1886. Serial No. 206,588. (Model.)

' `To @ZZ whom it may concern.-

`Be it known that I, ALFRED ELBROWN, a resident of Freeport, in thecounty of Stephensonand State of Illinois, have invented certain new anduseful Improvements in a Combined Latch and Lock; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use the same.

My invention is in locks of the class in which the key is inserted inthe knob which actuates the catch. It comprehends a catch operated byeither door-knob in the usual manner, a spring-catch that locksautomatically when the door closes, and a lock of which the bolt can bemoved from without only while the key is inserted, and in which pressureupon the end of the bolt cannot retract it. The lock may be instantlychanged from one to another of these forms, and requires only the spaceoccupied by an ordinary knob-catch without lock attachments. It involvesa movable lug lying within the spindle and operated from without only bya key, and which may be thrown into engagement with the lock-case,preventing the turning of the spindle while permitting the sliding ofthe bolt by pressure upon the end thereof. This gives the action of aspringlock. The lug may also be thrown out from the spindle stillfarther, when it engages not only the lock-case, but the catch or boltitself. All motion of the bolt is then prevented, and the locking isabsolute so long as the lug remains in this position. By moving acertain part upon the inner door-knob the lug may be thrown into eitherof its three positions,where it remains until said part is again moved,or until the key be inserted in the outer knob. The key may at alltimes, while inserted, withdraw the lug from engagement with both thelock-case and the bolt.

' In the accompanying drawings, to which this specication refers, Figure.1 shows from above the relative position of the lock-case, knobs, key,and changing-piece, the door being indicated by dotted lines. Fig. 2 isa side elevation of the lock, one side plate'being removed and thespindle cut in the plane of said plate when in position. Fig. 3 is anenlarged view of the spindle, both knobs being removed. Fig. 4 is alongitudinal central section of the knob-spindle. Figs. 5 and 6 aredetail views, explained in the following descript-ion.

In the drawings a mortise-lock is shown, although it is not essentialthat it be of this class. The relative position of lockvcase, door,spindle, and knobs is the same as in ordinary knob-catches.

In Fig. 1, 1 is the door; 2, the lock-case. 3 and 4 are the knobs. 5isthe spindle, 8 the key, and 12 the catch-bolt. Within the case, and uponthe spindle which passes through the case, is a short sleeve, 13,provided with lugs 13', which engage corresponding lugs upon thebifurcated inner end of the catch-bolt l2. A spring, 16, coiled about astud, 15, acts in the usual manner to keep the bolt 12 thrown forwardand vprojecting from the case, as shown. A lug, 9, Fig. 3, upon the bodyof the spindle engages constantly with the sleeve 13 by entering a slot,18, Fig. 2, and insures -the withdrawal of the bolt 12 whenever thespindle is rotated. The spindle is hollow, and within it a movable lugor latch, 10, Figs. 2, 3, 4, is mounted on` a pivot, 24, Fig. 4. Theouter edge of the free end of this lug lies in a slot, 11, in thespindle-shell,and normally iiush with the outer surface of the spindle,as illustrated in Figs. -2, 3, 4; but it may be thrown out to the dottedlines 10', or to any intermediate position,by means of aspring-lever,'21, operated by a changing-piece, 7, Figs. l, 3, 4.

Fig. 5 shows the lug and spring seen in the direction indicated by thearrow a, Fig. 4. The spring is pivotally inserted in the lug 10,- nearits free end, and is thus movable transversely to the plane of the lug.The other end of the spring is rounded, and fits loosely in a cup-likedepression, 20, Figs. 4 and 6, in the end of the piece 7 ,which fit-sand rotates in the cylindrical spindle-cavity 17. Now, if the piece 7 berotated, the outer end of the spring must move in a circle whose centeris in the axis of the piece 7, and both lug and spring acting as asingle lever fulcrumed at 24, the combination will, when therotation issufficient, take the position indicated by the dotted lines, Fig. 4. Thespring thus far acts as a rigid bar, so far as its rotation about itsfulcrum is concerned, the departure from its IOO original plane beingallowed by its pivotal connection. If, however, the lug be now forciblydepressed, it returns to its normal position,while the spring, flexedsufficiently to permit its motion, restores it to its former position onthe removal of the depressing force. rIhe rotation of the changing-piece7 is limited by a partial annular flange, 25, Figs. 4 and 6, whose edgesstrike a lug, 26, upon the interior of the spindle, and its accidentalmovement from any position is prevented by a frictionpin, 19, pressedoutward from the surface of the piece 7 by an underlying spring;

The spindle 5 and sleeve 13, Fig. 2, are retained in the same relativeposition with re'- spect to each other by the lug 9 in the slot 18, andif the movable lng 1() be thrown outward slightly, as above described,when the parts are in the normal position of Fig. 2, it enters a secondslot, 32, in the sleeve 13, and also corresponding slots in the sideplates, 2, of the lock-case, and the spindle cannot be rotated. Pressureupon the end of the bolt 12, however, will force it back, flexing thespring 16, and sliding the bolt-lugs backward away from the sleeve-lugs13', and we have a spring-Lock automatically locking when the doorcloses. If the lug 10 be forced still farther out, it engages yet deeperwith the lock-case, and also with a slot, 14, in the bolt 12. Thespindle cannot nowbe turned, nor can the bolt be forced back until thelugfis again retracted. Whether the lug 10 shall be entirely within thespindle and the apparatus act simply as a knobcatch, or slightlyprotruded to form a spring-lock, or fully thrown out engaging bothcaseand bolt, depends .on the position of the changing-piece 7withreference to the spindle. In the other end of the spindle is acylindrical body tting lthe spindle-cavity and having a cup-likedepression similar to the depression 20 in the changing-piece 7, andserving a similar purpose. A bar, 27, whose rounded .ends rest,respectively, in this depression and in a bearing-socket, 34, in the lug10, traverses a path similar to that of the spring 21, the transversepin 33 in the spindle serving at times asa fulcrum, for as the end 35 ofbar 27 is carried about by the rotation of the cylinder 23 the middle ofthe bar 27 must during a part of the revolution strike the middleportion of the pin 33, and if the other end of the bar be farther outthan' it is shown inthe drawings, as must be the case if the lug 10projects from the spindle, it must be drawn back to the position shown,since the bar 27 is rigid; and this will be true even if the spring 2lmust bend to permit such motion.

The rotation of the cylinder 23 is produced by a flat key inserted inits outer extremity, and the arrangement of wards to prevent its turningwhen any other than the proper key is insertedmay be any ofthe many,patented and unpatented, now in use without modifying any other parts.

If the outer edge, 30 31, of the lug 10 be made shorter, so as to fallentirely within the lock-case cavity, the bolt will be prevented frommoving by the entrance of the lug into the slot 14 alone; but in thiscase the slot 14 should be somewhat deeper than in the drawings.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a combined latch andlock, the combination of alock-case, aknob-spindlejournaled in said case and having rotary but notlongitudinal motion in its bearing, a catch-bolt operated by therotation of the spindle, and a lug lying normally within the spindle andadapted to be thrown outside the periphery thereof and into engagementwith the case, whereby rotation of the spindle is prevented.

2. In a combined lock andlatch, the combination of a lock-case, aknob-spindle j ournaled therein, a catch-bolt operated by the rotationof the spindle, and a lug lying normally wholly within the periphery ofthe spindle, but adapted to be projected outside of said periphery andto engage the .catch-bolt, thereby preventing the rotation of thespindle iand the v longitudinal movement of the bolt.

3. In a latch and lock, the combination of a lock-case, a catch-bolt,ahollow knob-spindle, and a lug within said spindle adapted to be thrownoutward into engagement with either the lock-case or the lock-case andcatch-bolt, whereby the simple knob-catch becomes a positive lock.

4. In a latch and lock, the combination .of a hollow knobspindle, acatch-bolt operated I thereby, alug pivoted in a slot in said spindle,

a spring-lever within said spindle attached at one end to said lug andhaving its other end carried in a circle by a hub revoluble in one endof the spindle, whereby in the movement of the lever the lug-pivot actsas a fulcrum, and the lug is projected or retracted whenever theresistance to its movement is insufficient to iiex the lever.

5. In a lock of the class specified, alhollow knob-spindle, a catch-boltoperated. thereby, a lug projectible from said spindle near its middle,two hubs revoluble, respectively, on the ends of the spindle, two leverslying within the spindle, each articulating at one end with said lug andbeing stepped at the other extremity in one of said hubs, near itscircumference, and for the middle portion of each lever a fulcrumsupported from the spindle, whereby the proper rotation of either hubmay cause the corresponding lever to react against its fulcrum andproject or retract the lug, substantially as and for the purpose setforth.- 6. In a latch and lock, a lock-case, a hollow knob-spindle, acatch-bolt operatedV thereby, a movable lug lying normally within saidspindle and actuated from one side of the door byarevolublechanging-piece in the end of the spindle, and from the other side by akey inserted in the other end of the spindle.

7. In a latch and lock, a catch-bolt, ahollow IIO spindle adapted tooperate said catch-bolt and hub may retract said lug, releasing saidspindle 1o and bolt.

In testimony whereof I have signed this specification in the presence oftwo subsoribing Witnesses.

v ALFRED H. BROWN. Vtnesses:

C. W. GRAHAM, JAMES I. NEFF.

